Open-source · Agents & automation · 5 of 9 tools · updated Oct 17, 2026
Open-source AI tools for AI workflow automation
n8n leads the open-source options for AI workflow automation at 100/100, with 207,742 GitHub stars. 5 of the 9 tools tracked for this job publish their source, so you can read it, fork it or self-host it. It is also the top-ranked tool for this job overall, open-source or not.
Same evidence score as the ranking — GitHub stars, Hacker News mentions, release activity, free access — recomputed nightly, never sold. See all 9 tools for AI workflow automation.
Top 3
evidence / 100
+ Self-hostable with code nodes and LangChain-based AI nodes at a fraction of Zapier's cost.
− Sustainable Use licence is not OSI open source and the learning curve is steeper than Zapier.
+ Python-native components can be edited inline, so flows are not limited to built-in nodes.
− Several critical security vulnerabilities in 2025 made exposed instances risky.
+ Covers prompt management, knowledge bases, and deployable APIs in one self-hostable app.
− Complex workflows get unwieldy in the visual canvas and version control is weak.
All 5, side by side
| Tool | Score | Stars | Source | Days idle | Platforms |
|---|---|---|---|---|---|
| n8n | 100 | 207,742 | n8n-io/n8n | 0 | web, linux, mac, windows |
| Langflow | 98 | 155,764 | langflow-ai/langflow | 0 | web, linux, mac, windows |
| Dify | 96 | 158,681 | langgenius/dify | 0 | web, linux |
 Activepieces | 86 | 25,079 | activepieces/activepieces | 0 | web, linux |
 Flowise | 42 | 55,509 | FlowiseAI/Flowise | 64 | web, linux |
Open source here means the tool's own source is public, not that a vendor published an SDK. Self-hosting cost is yours.
Head to head: n8n vs Langflow n8n vs Dify Langflow vs Dify